JP5903552B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator, and particularly to a structure that prevents return air that has cooled one room from leaking into the other room in a refrigerator having two temperature zones.

  FIG. 4 is a configuration diagram of a refrigeration cycle of a conventional refrigerator. In the figure, the refrigeration cycle includes a compressor 1, a condenser 2, a decompression device 3, a refrigerant circuit 5 in which a cooler 4 is connected in series, and a refrigeration with a low temperature zone controlled to two temperature zones by adjusting the cooling time. It is comprised by the cold air ventilation path 6 which ventilates cold air to a room | chamber (not shown) and a refrigerator compartment (not shown) with a high temperature zone.

  The cool air ventilation path 6 is a cooler 4, a cooling fan 7 that circulates cool air into the refrigerator, a freezer compartment provided in each of the air supply path 6 a and the return air path 6 b in order to selectively circulate cool air to the freezer compartment and the refrigerator compartment. It has the ventilation damper 8a, the refrigerator compartment ventilation damper 9a, the freezer compartment return damper 8b, and the refrigerator compartment return damper 9b.

  In such a refrigerator, when the freezer compartment becomes a certain set temperature or more and it is necessary to cool only the freezer compartment, the compressor 1 is operated and the cooling fan 7 is operated to operate the refrigerating cycle. To drive. Furthermore, only the freezer compartment is cooled by opening the freezer compartment blower damper 8a and the freezer compartment return damper 8b and closing the refrigerator compartment blower damper 9a and the refrigerator compartment return damper 9b.

  On the other hand, when the refrigerator compartment exceeds a certain set temperature and it is necessary to cool only the refrigerator compartment, the refrigerator compartment blower damper 9a and the refrigerator compartment return damper 9b are opened, and the refrigerator compartment fan damper 8a and the refrigerator compartment return are opened. By closing the damper 8b, only the refrigerator compartment is cooled.

  By controlling in this way, when cooling a refrigerated room with a high temperature zone, it is possible to prevent the flow of cold air with a high temperature into a freezer room with a low temperature zone, and to minimize the temperature rise of the freezer room. The refrigerator which can be suppressed is proposed (for example, refer to patent documents 1).

  As another method, the cold air that has cooled the refrigerator compartment is sucked in from the lower rear stage of the cooler 4, and the return air passage on the freezer compartment side is opened to the lower side so that the reverse flow to the freezer compartment side is prevented. Refrigerators with a preventive structure have been commercialized.

JP 2004-69245 A

  However, the above-described conventional configuration requires the freezer return damper 8a and the refrigerator return damper 9a for preventing the inflow of cold air, which increases the cost due to the addition of the damper and complicates the refrigerator duct. Since the volume of the path is required, there are problems such as a decrease in the volume of the storage chamber and a decrease in reliability due to an increase in movable parts.

  The present invention prevents the inflow of cold air without adding a large moving part such as a damper, thereby increasing the size of the storage room, and reducing the temperature rise in the freezer room at a low cost and with high reliability. An object is to provide a suppressed refrigerator.

  Further, in the specification in which the suction port is provided on the back surface of the cooler 4, in order to prevent clogging due to frost formation on the cooler 4, in the fin-and-tube type cooler, the fin pitch at the lower stage of the cooler 4 is increased. In order to cope with the problem by eliminating the fins, there is a problem that the capacity of the cooler 4 is lowered, or that the capacity of the cooler 4 is increased and the internal volume is reduced when the capacity is secured.

  Another object of the present invention is to provide a refrigerator having high cooling performance and minimizing temperature rise in the freezer compartment by preventing the inflow of cold air while maintaining the capacity of the cooler 4. .

In order to solve the above-described conventional problems, the refrigerator of the present invention includes a first storage chamber and a second storage chamber which are surrounded by a heat insulating wall and have an opening on the front surface, and the rear surface of the second storage chamber. A cooling chamber provided on the side, a cooler provided in the cooling chamber, a cooling fan that circulates cold air generated in the cooler to the first storage chamber and the second storage chamber, and the cooling fan A first discharge air passage that guides the cooling air from the cooling chamber into the first storage chamber, a second discharge air passage that guides the cooling air from the cooling fan into the second storage chamber, and the first storage. a first return air path for guiding the cooling air that has cooled the chamber again into the cooling chamber, and a second return air path for guiding again the cooling air having cooled the second storage chamber into the cooling chamber, wherein in a refrigerator having a water receiving tray for receiving it was thawed frost adhering to the cooler water, or the first return air trunk A first opening that guides the cooling air to the cooling chamber, and a cooling air from the second return air passage that is provided on a surface facing the first opening in the depth direction. A second opening is provided, and the cooling air discharged from the first opening flows backward through the second return air passage from the second opening between the first opening and the second opening. Cooling air discharged from the second opening by the second opening side wall of the water tray and the inflow prevention wall. Is guided to the direction of the cooler .

  With this configuration, it is possible to prevent the cool air that has cooled the first storage chamber from flowing into the second storage chamber with a simple configuration, and it is possible to suppress an increase in the temperature of the second storage chamber.

The refrigerator of the present invention can prevent the cold air that has cooled the first storage chamber from flowing into the second storage chamber with a simple configuration, and can suppress the temperature rise of the second storage chamber. Therefore, it is possible to provide a refrigerator with improved cooling efficiency at low cost.

The longitudinal cross-sectional view of the refrigerator in Embodiment 1 of this invention The front view of the state which opened the door of the refrigerator in Embodiment 1 Sectional drawing of the return air path vicinity of the refrigerator in Embodiment 1. Refrigeration cycle configuration diagram of a conventional refrigerator

The refrigerator of the present invention is surrounded by a heat insulating wall and has a first storage chamber and a second storage chamber having an opening on the front surface, a cooling chamber provided on the back side of the second storage chamber, and the cooling A cooler provided in the room, a cooling fan that circulates the cool air generated by the cooler to the first storage room and the second storage room, and cooling air from the cooling fan in the first storage room A first discharge air passage that leads to the second storage air passage, a second discharge air passage that guides the cooling air from the cooling fan to the second storage chamber, and the cooling air that has cooled the first storage chamber. A first return air passage that leads again to the cooling chamber, a second return air passage that guides the cooling air that has cooled the second storage chamber to the cooling chamber, and water that has defrosted the cooler. in a refrigerator having a water receiving tray for receiving a first directing cooling air from the first return air path to the cooling chamber And a second opening for guiding the cooling air from the second return air passage provided on the surface facing the first opening in the depth direction to the cooling chamber. Between the opening and the second opening, the cooling air discharged from the first opening flows backward from the second opening through the second return air passage and flows into the second storage chamber. The inflow prevention wall is configured to prevent the cooling air discharged from the second opening toward the cooler by the wall on the second opening side of the water tray and the inflow prevention wall . .

With this configuration, the cool air that has cooled the refrigerator compartment by the water tray and the inflow prevention wall can be smoothly guided to the cooler, the inflow prevention wall can be reduced, and the temperature of the second storage chamber can be reduced at a lower cost. The rise can be suppressed.

  In the refrigerator according to the present invention, the inflow prevention wall is configured to change the direction of the cooling air discharged from the first opening toward the cooler.

  With this configuration, the cold air that has cooled the first storage chamber does not flow to the return air passage side of the first storage chamber, but can flow all to the cooler, and the temperature of the second storage chamber rises more reliably. Can be suppressed.

The refrigerator of the present invention has a configuration characterized in that the second return air passage is provided on the front side of the cooling chamber, and the first return air passage is provided on the back side of the cooling chamber.

  By this structure, it can be set as the structure with high heat insulation performance provided with the return air path whose temperature is higher than a cooler between a cooler and a heat insulation wall, and suppresses the temperature rise of the 2nd store room more. Can do.

  The refrigerator of the present invention is characterized in that the first opening and the second opening are provided vertically below the cooler.

  With this configuration, the return cold air can be sucked from under the cooler, the cool air can be efficiently flowed through the entire cooler, and the cooling efficiency of the refrigerator can be increased.

  The refrigerator of the present invention includes a first air passage closing means for selectively closing and opening the first discharge air passage, and a second air passage for selectively closing and opening the second discharge air passage. A closing means is provided, and the first closing means and the second closing means are not simultaneously opened during operation of the cooling fan.

  With this configuration, it is possible to prevent the cold air that has cooled the first storage chamber from flowing into the second storage chamber, and to increase the evaporation temperature when cooling the first storage chamber. The efficiency of the refrigeration cycle can be increased.

  Moreover, the refrigerator of this invention is set as the structure characterized by the temperature of a 1st store room being higher than the temperature of a 2nd store room.

  With this configuration, it is possible to provide a configuration with a high heat insulation performance including a return air passage from a refrigeration room having a higher temperature between the cooler and the heat insulation wall, thereby further suppressing an increase in the temperature of the freezer room. it can.

In addition, the refrigerator of the present invention is characterized in that the inflow prevention wall is provided on a portion other than the vertically downward projection surface of the cooler.

  With this configuration, water generated when the cooler is defrosted does not flow through the inflow prevention wall and does not flow into the freezer compartment. Thereby, abnormal frost formation and freezing in a freezer compartment can be prevented.

  Moreover, the refrigerator of the present invention has a configuration characterized in that a fitting portion is provided between the inflow prevention wall and the water tray.

  With this configuration, it is possible to configure an air passage without creating a gap between the inflow prevention wall and the water tray, there is no leakage of cold air between the inflow prevention wall and the water tray, and the temperature rise in the freezer compartment can be further suppressed. it can.

  The refrigerator of the present invention includes a first discharge air passage, a first return air passage, a first closing means, and a second closing means inside, and a cover that partitions the cooler and the first storage chamber. And the cover and the inflow prevention wall are integrated.

  With this configuration, the number of parts can be reduced. Thereby, while being able to comprise an air path at low cost, the variation of an assembly can be reduced and the temperature rise of a freezer compartment can be suppressed more at low cost.

  In addition, the refrigerator of the present invention is provided with a heating means for defrosting frost adhering to the cooler, and the height of the first opening is wider than the height from the upper end to the lower end of the heating means.

  With this configuration, the air path resistance is reduced by the flow of cool air above and below the heating means, and a reduction in the air volume of the cooling fan can be suppressed. Thereby, it can be set as a refrigerator with higher cooling efficiency.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a refrigerator in an embodiment of the present invention. FIG. 2 is a front view of the embodiment with the door opened. FIG. 3 is a sectional view of the vicinity of the return air passage in the same embodiment.

  In FIG. 1 to FIG. 3, the refrigerator main body 11 composed of a heat insulating wall includes a refrigerator compartment 12 at the top and a freezer compartment 13 at the bottom, and includes a compressor 1, a condenser (not shown), A refrigerant circuit including a decompression device (not shown) and a cooler 4 is provided.

  The freezer compartment 13 is provided with a cooling chamber 14 for accommodating the cooler 4 therein, and is partitioned by the cooler cover 15 from the inside of the freezer compartment 13.

  Above the cooler 4, there are provided a cooling fan 7 that selectively circulates the cold air generated by the cooler 4 to the refrigerator compartment 12 and the freezer compartment 13, a refrigerator air blower damper 9 a, and a freezer compartment fan damper 8 a.

  The refrigerator compartment blower damper 9a and the refrigerator compartment 12 communicate with each other by a refrigerator compartment discharge air passage 16, and the refrigerator compartment fan damper 9a is opened so that the refrigerator compartment 12 and the refrigerator compartment 14 communicate with each other.

  The freezer compartment blower damper 8a and the inside of the freezer compartment 13 communicate with each other by a freezer compartment discharge air passage 17, and the freezer compartment blower damper 8a is opened so that the freezer compartment 13 and the cooler compartment 14 communicate with each other.

A refrigerator compartment suction port 18 is provided on the back surface of the cooling chamber 14 below the cooler 4, and a freezer compartment suction port 19 is provided on the front surface. The cooler 4 is provided between the cooling chamber 14 and the refrigerator body 11, respectively. And the freezer compartment return air passage 21 provided at the lower part of the cooler cover 15 are opened to communicate with each other.

  Below the cooler 4, a heating means 22 such as a radiant heater is provided between the upper end and the lower end of the refrigeration chamber suction port 18 to defrost frost attached to the cooler 4 by the cooling operation, and further below that A water tray 23 and a drain pipe 24 are provided for discharging water generated when frost is thawed to the outside.

  A cooler drainer 15a that protrudes downward is provided on the cooler 4 side at the lower end of the cooler cover 15.

  An inflow prevention wall 25 is provided at the lower part of the cooler cover 15. The inflow prevention wall 25 has a rectangular plate shape, is at least wider than the width of the refrigerator compartment suction port 18, and includes a fitting portion 25 a with a wall in front of the water tray 23 at the lower part. In addition, the gap with the water receiving tray 23 is eliminated, and the variation in the position of the inflow prevention wall 25 is eliminated.

  The inflow prevention wall 25 is inclined so that the upper end is closer to the back side of the refrigerator main body 11 than the lower end, and is disposed at a position on the front side of the vertically downward projection surface of the cooler 4.

  About the refrigerator comprised as mentioned above, the operation | movement is demonstrated below.

  During refrigerator operation, the internal temperature rises, the temperature of the freezer compartment 13 exceeds the reference temperature, and the freezer compartment 13 needs to be cooled. If the compressor 1 is stopped, the compressor 1 is operated. If it is already operating, it continues to operate, the cooling fan 7 is operated, the freezer compartment blower damper 8a is opened, and the refrigerator compartment blower damper 9a is closed.

  Thereby, the cool air generated by the cooler 4 flows from the freezer compartment blower damper 8a through the freezer compartment discharge air passage 17 and into the freezer compartment 13, thereby cooling the inside of the freezer compartment 13.

  At this time, the cold air that has cooled the freezer compartment 13 is sucked in the order of the freezer return air passage 21 and the freezer compartment suction port 19, is cooled again by the cooler 4, and is discharged from the freezer compartment blower damper 8 a and freezer compartment by the cooling fan 7. The air is discharged from the air passage 17 into the freezer compartment 13.

  On the other hand, when the temperature of the refrigerator compartment 12 exceeds the reference temperature and the refrigerator compartment 12 needs to be cooled, the cooling fan 7 is operated, the refrigerator compartment blower damper 9a is opened, and the refrigerator compartment blower damper 8a is closed.

  Thus, the cold air generated by the cooler 4 flows from the refrigerating chamber blower damper 9a through the refrigerating chamber discharge air passage 16 and into the refrigerating chamber 12, thereby cooling the inside of the refrigerating chamber 12.

  At this time, the cold air that has cooled the refrigerator compartment 12 is sucked in the order of the refrigerator compartment return air passage 20 and the refrigerator compartment suction port 18, and the direction is changed to the cooler 4 side by the inflow prevention wall 25. After being cooled, the cooling fan 7 discharges the refrigerator compartment air blower damper 9 a and the refrigerator compartment discharge air passage 16 into the refrigerator compartment 12.

Here, when there is no inflow prevention wall 25, the cold air sucked from the refrigerator compartment suction port 18 gets over the front wall of the water receiving tray 23 and flows backward from the freezer compartment suction port 19 through the freezer return air passage 21. And flows into the freezer compartment 13. At this time, the cold air flowing from the refrigerator compartment suction port 18 is higher than the temperature in the freezer compartment 13 because the refrigerator compartment 12 is cooled, and the temperature of the freezer compartment 13 rises.

  On the other hand, when there is the inflow prevention wall 25, the cold air sucked from the refrigerator compartment suction port 18 flows from the water tray 23 along the inflow prevention wall 25, so that the flow direction is toward the cooler 4. Therefore, it does not flow toward the freezer compartment inlet 19.

  Therefore, even if the damper as in the conventional example is not provided in the freezer compartment suction port 19, the freezer compartment 13 is not heated by the cold air after the refrigerator compartment 12 is cooled while the refrigerator compartment 12 is being cooled, and it is ensured with an inexpensive configuration. Moreover, the temperature rise of the freezer compartment 13 can be suppressed, and it can be set as the refrigerator with high cooling performance.

  In addition, since the refrigerator compartment return air passage 20 is provided between the cooling chamber 14 and the heat insulating wall on the back surface of the refrigerator main body 11 with substantially the same width as or larger than that of the cooler 4, Since the temperature difference in the refrigerator main body 11 can be reduced, the heat transfer is reduced and the heat insulation effect is increased.

  Furthermore, when the refrigerator compartment 12 is being cooled, the freezer compartment air damper 8a is closed to circulate the cold air only in the refrigerator compartment 12, and when there is no freezer compartment air damper 8a, the refrigerator compartment 12 is cooled. The temperature of the cooler 4 can be increased compared to the case where the freezer blower damper 8a is not closed, and the efficiency of the cooling cycle during cooling of the refrigerator compartment 12 is increased, but it flows in the refrigerator return air passage 20. The temperature of the cold air is further increased.

  Even in such a configuration, it is possible to reliably prevent cold air from leaking into the freezer compartment 13.

  Therefore, the temperature rise of the freezer compartment 13 can be suppressed even in a refrigerator with a higher heat insulation effect, and a refrigerator with high cooling performance can be obtained.

  Further, in the refrigerator of the present invention, the refrigerator compartment inlet 18 and the freezer compartment inlet 19 are opened below the cooler 4. Thereby, the leakage of the cold air to the freezer compartment 13 can be prevented without reducing the lower fins of the cooler 4.

  Therefore, the temperature rise of the freezer compartment 13 can be suppressed without reducing the capacity of the cooler 4, and a refrigerator with high cooling performance can be obtained.

  Further, the inflow prevention wall 25 is fixed by the water receiving tray 23 and the fitting portion 25 a, and the cold air that has cooled the refrigerator compartment 12 by the water receiving tray 23 and the inflow prevention wall 25 can be guided to the cooler 4. Accordingly, the water receiving tray 23 can be used as an air path, the inflow preventing wall 25 can be made small, and the inflow preventing wall 25 is fixed by the fitting portion 25a with the water receiving tray 23. Due to the variation, a gap is formed between the water receiving tray 23 and the inflow prevention wall 25, and cold air does not leak into the freezer compartment 13 from the gap.

  Therefore, the temperature rise of the freezer compartment 13 can be more reliably suppressed with a cheaper configuration, and a refrigerator with high cooling performance can be obtained.

  Further, the inflow prevention wall 25 is integrated with the cooler cover 15. Thereby, since the number of parts can be reduced, the inflow prevention wall 25 can be comprised more inexpensively.

  Therefore, the temperature rise of the freezer compartment 13 can be suppressed with a cheaper configuration, and a refrigerator with high cooling performance can be obtained.

  Further, since the refrigerating room suction port 18 opens at a height from a position higher than the heating means 22 to a lower position, the cold air that has cooled the refrigerating room 12 is sucked in from the refrigerating room suction port 18 and is heated. From a position lower than 22, the water is sucked into the cooler 4 along the inflow prevention wall 25 from the water receiving tray 23, and is directly sucked into the cooler 4 from a position higher than the heating means 22.

  On the other hand, when the refrigerating room suction port 18 is opened only at a position higher than the heating means 22, the direction of the cold air from the refrigerating room suction port 18 is rapidly changed when sucked into the cooler 4. Pressure loss increases.

  Further, when the refrigerating room suction port 18 is opened only at a position lower than the heating means 22, all the cold air sucked from the refrigerating room suction port 18 flows from the water receiving tray 23 to the inflow prevention wall 25, and the wind speed is high. Therefore, in order to prevent cold air from leaking into the freezer compartment 13, it is necessary to further incline the inflow prevention wall 25 toward the cooler 4, and pressure loss increases.

  In order to reduce the pressure loss, when the heating means 22 is separated from the refrigerating room suction port 18, the cooling chamber 14 is provided in order to secure a certain distance between the heating means 22 and the surrounding parts for ensuring safety. It becomes large and the internal volume becomes small.

  Therefore, without reducing the internal volume, the pressure loss of the air passage can be suppressed to a small level, the temperature rise of the freezer compartment 13 can be suppressed, and a refrigerator with high cooling performance can be obtained.

  Further, since the inflow prevention wall 25 is located on a plane other than the vertically downward projection surface of the cooler 4, the defrost water generated when the operation of defrosting the frost attached to the cooler 4 is performed on the inflow prevention wall 25. It does not leak into the 13 freezer compartment.

  Furthermore, the cooler cover 15 is provided with a drainer 15a. Even if the water melted on the surface of the cooler 4 flows along the cooler cover 15, it falls downward at the drainer 15a portion, so that the water is cooled. There is no leakage into the freezer compartment 13 along the container cover 15. At this time, by setting the inflow prevention wall 25 at an angle such that the upper end comes to the front side of the drainer 15a, water falling from the drainer 15a may leak into the freezer compartment 13 through the inflow prevention wall 25. No.

  Therefore, the temperature rise of the freezer compartment 13 can be suppressed while preventing water leakage into the freezer compartment 13, and a refrigerator with high cooling performance can be obtained.

  In the present embodiment, the freezer compartment 13 is disposed below and the refrigerator compartment 12 is disposed above. However, if the refrigerator has two temperature zones, the same effect can be obtained even in the left-right arrangement.

  In the present embodiment, a refrigerator having two storage rooms, that is, a freezer compartment 13 and a refrigerator compartment 12, has been described. However, a suction port is provided at the front and back of the cooling compartment 14 in a refrigerator having two or more storage compartments. The same effect can be obtained if the refrigerator has a refrigerator.

  Further, in the present embodiment, the description has been given of the specification in which the cold air is generated by the refrigerant compression refrigeration cycle using the compressor 1, but any refrigeration system may be used as long as it is a refrigeration system that generates the cold air by the cooler 4. However, the same effect can be obtained.

  This invention is a refrigerator provided with two store rooms, Comprising: The refrigerator which performs cooling of these store rooms efficiently can be provided. Therefore, the present invention is useful as refrigerators of various types and sizes such as home use and business use.

DESCRIPTION OF SYMBOLS 4 Cooler 7 Cooling fan 8a Freezer compartment blower damper 9a Refrigeration compartment blower damper 11 Refrigerator body 12 Refrigerator compartment 13 Freezer compartment 14 Cooling compartment 15 Cooler cover 16 Refrigerator compartment discharge air passage 17 Freezer compartment discharge air passage 18 Refrigeration compartment inlet 19 Freezer compartment inlet 20 Refrigerating compartment return air passage 21 Freezer compartment return air passage 22 Heating means 23 Water tray 25 Inflow prevention wall 25a Fitting portion

Claims (10)

A first storage chamber and a second storage chamber surrounded by a heat insulating wall and having an opening on the front surface; a cooling chamber provided on the back side of the second storage chamber; and a cooler provided in the cooling chamber A cooling fan that circulates the cold air generated in the cooler to the first storage chamber and the second storage chamber, and a first that guides cooling air from the cooling fan to the first storage chamber A discharge air passage, a second discharge air passage that guides the cooling air from the cooling fan to the second storage chamber, and a first air that guides the cooling air that has cooled the first storage chamber to the cooling chamber. A return air passage, a second return air passage that guides the cooling air that has cooled the second storage chamber to the cooling chamber, and a water receiving tray that receives water that has defrosted the cooler. In the provided refrigerator, a first opening for guiding cooling air from the first return air passage to the cooling chamber, and a depth And a second opening for guiding cooling air from the second return air passage to the cooling chamber provided on a surface facing the first opening in the direction, the first opening and the second Inflow prevention for preventing the cooling air discharged from the first opening from flowing backward from the second opening through the second return air passage into the second storage chamber A refrigerator that includes a wall and guides the cooling air discharged from the second opening toward the cooler by the wall on the second opening side of the water tray and the inflow prevention wall . The refrigerator according to claim 1, wherein the inflow prevention wall changes the direction of the cooling air discharged from the first opening toward the cooler. The refrigerator according to claim 1 or 2, wherein the second return air passage is provided on the front side of the cooling chamber, and the first return air passage is provided on the back side of the cooling chamber. The refrigerator according to any one of claims 1 to 3, wherein the first opening and the second opening are provided vertically below the cooler. A first air passage closing means for selectively closing or opening the first discharge air passage; and a second air passage closing means for selectively closing or opening the second discharge air passage; The refrigerator according to any one of claims 1 to 4 , wherein the first closing means and the second closing means are not opened simultaneously during operation of the cooling fan. The refrigerator according to any one of claims 1 to 5 , wherein the temperature of the first storage chamber is higher than the temperature of the second storage chamber. The refrigerator according to any one of claims 1 to 6, wherein an inflow prevention wall is provided on a portion other than a vertically downward projection surface of the cooler. The refrigerator according to any one of claims 1 to 7 , wherein a fitting portion is provided between the inflow prevention wall and the water tray. A first discharge air passage, a first return air passage, a first closing means, and a second closing means are provided therein, and a cover for partitioning the cooler and the first storage chamber is provided to prevent the inflow from the cover. The refrigerator according to claim 5 , wherein the wall has an integral structure. Heating means thawing the frost adhering to the cooler is provided, in any one of the height of the first opening from claim 1 characterized by wider than the height of the lower end from an upper end of the heating means 9 The refrigerator described.